Q: A solution has $$[\mathrm{OH^-}] = 1.5 \times 10$$^{-2}$$\ \mathrm{M}. $$What is the $$[\mathrm{H_3O^+}] in $$this solution at 25°C?

$$6.7 \times 10$$^{-13}$$\ \mathrm{M}$$

Question 1

Which of the following statements best describes the Arrhenius definition of an acid?

Accepted Answer

An acid produces H$$^{+}$$ ions in aqueous solution.

Question 2

A student mixes hydrochloric acid (HCl) with sodium hydroxide (NaOH) in a titration experiment. What is the net ionic equation for the neutralization reaction?

Accepted Answer

$$\mathrm{H^+}(aq) + \mathrm{OH^-}(aq) \rightarrow \mathrm{H_2O}(l)$$

Question 3

Which property is NOT characteristic of acids?

Accepted Answer

Acids feel slippery.

Question 4

Which of the following acids is classified as a strong acid?

Accepted Answer

Hydrochloric acid ($$\mathrm{HCl})$$

Question 5

A solution contains 0.025 M Sr(OH)$$_2. $$What is the concentration of OH$$^{-}$$ ions?

Accepted Answer

$$0.050\ \mathrm{M}$$

Question 6

Which of the following is an example of a carboxylic acid?

Accepted Answer

Acetic acid ($$\mathrm{HC_2H_3O_2})$$

Question 7

Which of the following statements about the Brønsted–Lowry definition is correct?

Accepted Answer

An acid is a proton donor and a base is a proton acceptor.

Question 8

What is the pH of a solution with $$[\mathrm{H_3O^+}] = 1.0 	imes 10$$^{-7}$$\ \mathrm{M} at 25$$°C?

Accepted Answer

pH = 7

Question 9

Which of the following reactions is an example of a gas evolution reaction?

Accepted Answer

$$\mathrm{HCl}(aq) + \mathrm{$$NaHCO_3$$}(aq) \rightarrow \mathrm{H_2O}(l) + \mathrm{CO_2$}(g) + \mathrm{NaCl}(aq)$$

Question 10

A buffer solution contains significant amounts of which two components?

Accepted Answer

A weak acid and its conjugate base

Question 11

Which of the following bases is classified as a strong base?

Accepted Answer

Potassium hydroxide ($$\mathrm{KOH})$$

Question 12

Which of the following statements about water is correct?

Accepted Answer

Water is amphoteric; it can act as either an acid or a base.

Question 13

A solution has $$[\mathrm{OH^-}] = 1.5 	imes 10$$^{-2}$$\ \mathrm{M}. $$What is the $$[\mathrm{H_3O^+}] in $$this solution at 25°C?

Accepted Answer

$$6.7 	imes 10$$^{-13}$$\ \mathrm{M}$$

Question 14

Which of the following is NOT a property of bases?

Accepted Answer

Bases turn blue litmus paper red.

Question 15

Which of the following statements about strong acids and weak acids is correct?

Accepted Answer

Strong acids completely ionize in solution.

Question 16

What is the effect of ethylene glycol poisoning on blood pH?

Accepted Answer

Blood pH drops to dangerously low levels.

Question 17

Which of the following is a real-world consequence of acid rain?

Accepted Answer

Acid rain dissolves metals and metal oxides in building materials.

Question 18

A titration of 10.00 mL of HCl solution requires 12.54 mL of 0.100 M NaOH to reach the equivalence point. What is the concentration of the HCl solution?

Accepted Answer

$$0.125\ \mathrm{M}$$

Question 19

Which of the following pairs is a conjugate acid–base pair?

Accepted Answer

$$\mathrm{H_2O}$$ and $$\mathrm{OH^-}$$

Acids and Bases: Properties, Definitions, and Reactions

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